1952-08-14	null
1943-02-02	1947-05-12
1947-05-12	1957-12-10
1957-12-10	1968-02-03
1968-02-03	1981-03-14
1981-03-14	1989-02-02
1989-02-02	1995-10-09
1995-10-09	1999-01-03
1999-01-03	2007-10-01
2007-10-01	2013-01-03
2013-01-03	2015-01-01
2015-01-01	null
